remcos | ed73c850e933acc5b599b4afb095b7e1244133c28e94fdb30ffb31b22a4b3c6a

Analysis

max time kernel
149s
max time network
148s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
27/11/2024, 16:31

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General

Target

RFQ-00948-STELLION-878378.exe
Size

1.1MB
MD5

7d78937ebc3648958437741df13eec52
SHA1

9b30169d5adb06c082d6b9e297368faad45725f5
SHA256

ed73c850e933acc5b599b4afb095b7e1244133c28e94fdb30ffb31b22a4b3c6a
SHA512

7e1acb40093bdb9a23d598a5766011409e6ef88b329c69eec3b32ea6873817e09b41e70383ae5eed3752283087db35ede2f28bf291c49df14fbeaf5b98decba4
SSDEEP

24576:PYoOciJwQYaoRuivChV3DSwctuoqBMY9zVZEueHTf:PsbwQIRssqBMWVZEu

Score

10^/10

remcos remotehost discovery execution persistence rat

Malware Config

Extracted

Family

remcos

Botnet

RemoteHost

206.189.218.238:4782

206.189.218.238:2286

206.189.218.238:3363

206.189.218.238:3386

Attributes

audio_folder
MicRecords
audio_path
ApplicationPath
audio_record_time
5
connect_delay
0
connect_interval
1
copy_file
remcos.exe
copy_folder
Remcos
delete_file
false
hide_file
false
hide_keylog_file
false
install_flag
true
keylog_crypt
false
keylog_file
logs.dat
keylog_flag
false
keylog_folder
remcos
mouse_option
false
mutex
Rmc-NJK093
screenshot_crypt
false
screenshot_flag
true
screenshot_folder
Screenshots
screenshot_path
%AppData%
screenshot_time
1
take_screenshot_option
false
take_screenshot_time
5

Signatures

Remcos
Remcos is a closed-source remote control and surveillance software.
rat remcos
Remcos family
remcos

Command and Scripting Interpreter: PowerShell 1 TTPs 2 IoCs

Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.

execution

PowerShell

T1059.001

pid	Process
2932	powershell.exe
2268	powershell.exe

Executes dropped EXE 3 IoCs

pid	Process
2832	remcos.exe
1020	remcos.exe
1636	remcos.exe

Loads dropped DLL 1 IoCs

pid	Process
2636	RFQ-00948-STELLION-878378.exe

Adds Run key to start application 2 TTPs 4 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-312935884-697965778-3955649944-1000\Software\Microsoft\Windows\CurrentVersion\Run\Rmc-NJK093 = "\"C:\\ProgramData\\Remcos\\remcos.exe\""	remcos.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\Rmc-NJK093 = "\"C:\\ProgramData\\Remcos\\remcos.exe\""	remcos.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-312935884-697965778-3955649944-1000\Software\Microsoft\Windows\CurrentVersion\Run\Rmc-NJK093 = "\"C:\\ProgramData\\Remcos\\remcos.exe\""	RFQ-00948-STELLION-878378.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\Rmc-NJK093 = "\"C:\\ProgramData\\Remcos\\remcos.exe\""	RFQ-00948-STELLION-878378.exe

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 2296 set thread context of 2636	2296	RFQ-00948-STELLION-878378.exe	35
PID 2832 set thread context of 1636	2832	remcos.exe	42

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

System Location Discovery: System Language Discovery 1 TTPs 8 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	RFQ-00948-STELLION-878378.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	remcos.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	powershell.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	remcos.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	RFQ-00948-STELLION-878378.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	powershell.exe

Scheduled Task/Job: Scheduled Task 1 TTPs 2 IoCs

Schtasks is often used by malware for persistence or to perform post-infection execution.

persistence execution

Scheduled Task

T1053.005

pid	Process
2280	schtasks.exe
2996	schtasks.exe

Suspicious behavior: EnumeratesProcesses 12 IoCs

pid	Process
2296	RFQ-00948-STELLION-878378.exe
2296	RFQ-00948-STELLION-878378.exe
2296	RFQ-00948-STELLION-878378.exe
2296	RFQ-00948-STELLION-878378.exe
2268	powershell.exe
2832	remcos.exe
2832	remcos.exe
2832	remcos.exe
2932	powershell.exe
2832	remcos.exe
2832	remcos.exe
2832	remcos.exe

Suspicious use of AdjustPrivilegeToken 4 IoCs

description	pid	Process
Token: SeDebugPrivilege	2296	RFQ-00948-STELLION-878378.exe
Token: SeDebugPrivilege	2268	powershell.exe
Token: SeDebugPrivilege	2832	remcos.exe
Token: SeDebugPrivilege	2932	powershell.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1636	remcos.exe

Suspicious use of WriteProcessMemory 50 IoCs

description	pid	Process	procid_target
PID 2296 wrote to memory of 2268	2296	RFQ-00948-STELLION-878378.exe	31
PID 2296 wrote to memory of 2268	2296	RFQ-00948-STELLION-878378.exe	31
PID 2296 wrote to memory of 2268	2296	RFQ-00948-STELLION-878378.exe	31
PID 2296 wrote to memory of 2268	2296	RFQ-00948-STELLION-878378.exe	31
PID 2296 wrote to memory of 2280	2296	RFQ-00948-STELLION-878378.exe	32
PID 2296 wrote to memory of 2280	2296	RFQ-00948-STELLION-878378.exe	32
PID 2296 wrote to memory of 2280	2296	RFQ-00948-STELLION-878378.exe	32
PID 2296 wrote to memory of 2280	2296	RFQ-00948-STELLION-878378.exe	32
PID 2296 wrote to memory of 2636	2296	RFQ-00948-STELLION-878378.exe	35
PID 2296 wrote to memory of 2636	2296	RFQ-00948-STELLION-878378.exe	35
PID 2296 wrote to memory of 2636	2296	RFQ-00948-STELLION-878378.exe	35
PID 2296 wrote to memory of 2636	2296	RFQ-00948-STELLION-878378.exe	35
PID 2296 wrote to memory of 2636	2296	RFQ-00948-STELLION-878378.exe	35
PID 2296 wrote to memory of 2636	2296	RFQ-00948-STELLION-878378.exe	35
PID 2296 wrote to memory of 2636	2296	RFQ-00948-STELLION-878378.exe	35
PID 2296 wrote to memory of 2636	2296	RFQ-00948-STELLION-878378.exe	35
PID 2296 wrote to memory of 2636	2296	RFQ-00948-STELLION-878378.exe	35
PID 2296 wrote to memory of 2636	2296	RFQ-00948-STELLION-878378.exe	35
PID 2296 wrote to memory of 2636	2296	RFQ-00948-STELLION-878378.exe	35
PID 2296 wrote to memory of 2636	2296	RFQ-00948-STELLION-878378.exe	35
PID 2296 wrote to memory of 2636	2296	RFQ-00948-STELLION-878378.exe	35
PID 2636 wrote to memory of 2832	2636	RFQ-00948-STELLION-878378.exe	36
PID 2636 wrote to memory of 2832	2636	RFQ-00948-STELLION-878378.exe	36
PID 2636 wrote to memory of 2832	2636	RFQ-00948-STELLION-878378.exe	36
PID 2636 wrote to memory of 2832	2636	RFQ-00948-STELLION-878378.exe	36
PID 2832 wrote to memory of 2932	2832	remcos.exe	37
PID 2832 wrote to memory of 2932	2832	remcos.exe	37
PID 2832 wrote to memory of 2932	2832	remcos.exe	37
PID 2832 wrote to memory of 2932	2832	remcos.exe	37
PID 2832 wrote to memory of 2996	2832	remcos.exe	39
PID 2832 wrote to memory of 2996	2832	remcos.exe	39
PID 2832 wrote to memory of 2996	2832	remcos.exe	39
PID 2832 wrote to memory of 2996	2832	remcos.exe	39
PID 2832 wrote to memory of 1020	2832	remcos.exe	41
PID 2832 wrote to memory of 1020	2832	remcos.exe	41
PID 2832 wrote to memory of 1020	2832	remcos.exe	41
PID 2832 wrote to memory of 1020	2832	remcos.exe	41
PID 2832 wrote to memory of 1636	2832	remcos.exe	42
PID 2832 wrote to memory of 1636	2832	remcos.exe	42
PID 2832 wrote to memory of 1636	2832	remcos.exe	42
PID 2832 wrote to memory of 1636	2832	remcos.exe	42
PID 2832 wrote to memory of 1636	2832	remcos.exe	42
PID 2832 wrote to memory of 1636	2832	remcos.exe	42
PID 2832 wrote to memory of 1636	2832	remcos.exe	42
PID 2832 wrote to memory of 1636	2832	remcos.exe	42
PID 2832 wrote to memory of 1636	2832	remcos.exe	42
PID 2832 wrote to memory of 1636	2832	remcos.exe	42
PID 2832 wrote to memory of 1636	2832	remcos.exe	42
PID 2832 wrote to memory of 1636	2832	remcos.exe	42
PID 2832 wrote to memory of 1636	2832	remcos.exe	42

C:\Users\Admin\AppData\Local\Temp\RFQ-00948-STELLION-878378.exe
"C:\Users\Admin\AppData\Local\Temp\RFQ-00948-STELLION-878378.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2296
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\QgjhVvUyb.exe"
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2268
- C:\Windows\SysWOW64\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\QgjhVvUyb" /XML "C:\Users\Admin\AppData\Local\Temp\tmpCDC.tmp"
  2⤵
  - System Location Discovery: System Language Discovery
  - Scheduled Task/Job: Scheduled Task
  PID:2280
- C:\Users\Admin\AppData\Local\Temp\RFQ-00948-STELLION-878378.exe
  "C:\Users\Admin\AppData\Local\Temp\RFQ-00948-STELLION-878378.exe"
  2⤵
  - Loads dropped DLL
  - Adds Run key to start application
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2636
- - C:\ProgramData\Remcos\remcos.exe
    "C:\ProgramData\Remcos\remcos.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious use of SetThreadContext
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of WriteProcessMemory
    PID:2832
  - - C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\QgjhVvUyb.exe"
      4⤵
      Command and Scripting Interpreter: PowerShell
      System Location Discovery: System Language Discovery
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      PID:2932
  - - C:\Windows\SysWOW64\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\QgjhVvUyb" /XML "C:\Users\Admin\AppData\Local\Temp\tmp5C53.tmp"
      4⤵
      System Location Discovery: System Language Discovery
      Scheduled Task/Job: Scheduled Task
      PID:2996
  - - C:\ProgramData\Remcos\remcos.exe
      "C:\ProgramData\Remcos\remcos.exe"
      4⤵
      Executes dropped EXE
      PID:1020
  - - C:\ProgramData\Remcos\remcos.exe
      "C:\ProgramData\Remcos\remcos.exe"
      4⤵
      Executes dropped EXE
      Adds Run key to start application
      System Location Discovery: System Language Discovery
      Suspicious use of SetWindowsHookEx
      PID:1636

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

T1059

PowerShell

T1059.001

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\ProgramData\Remcos\logs.dat

Filesize
144B

MD5
9fc6526de3f0150e34430a5e8fbba3f8

SHA1
cf3101ea53176e5fecd23b6530c27b6d30a9edf5

SHA256
6642160eee4692eebddb0c9d1d0d55cab84f9ed4b9c1dd213174023fef4e7d1c

SHA512
d37aba6f52678f3af9892bf4fa5ec3e94c9d9ccbcb77f391cf046af245012f236b7a0231fb529130a7a47e8fd5ee614a87a632ab82382912374e4d87b7468cc1

Download Submit
C:\ProgramData\Remcos\remcos.exe

Filesize
1.1MB

MD5
7d78937ebc3648958437741df13eec52

SHA1
9b30169d5adb06c082d6b9e297368faad45725f5

SHA256
ed73c850e933acc5b599b4afb095b7e1244133c28e94fdb30ffb31b22a4b3c6a

SHA512
7e1acb40093bdb9a23d598a5766011409e6ef88b329c69eec3b32ea6873817e09b41e70383ae5eed3752283087db35ede2f28bf291c49df14fbeaf5b98decba4

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmpCDC.tmp

Filesize
1KB

MD5
8573596572106cfdfba63f7a2e4fd730

SHA1
553950f8408e14cda9ce155ee8b4baa467cc3563

SHA256
f7e127f0f6a2327579af762a63776577b5317ca37e51c1c27a9d49c6ced7610f

SHA512
f07d644f693091d6a5e5e821d59ff8abe5e69db3f43c1d9bc8b43bafc856c53de3473cbbc2bc25316373c82c7cfaf36b201504b6c10f80dfad23c9c5fde58604

Download Submit
C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\CustomDestinations\d93f411851d7c929.customDestinations-ms

Filesize
7KB

MD5
2c1f31a75cd94b6ed53b61edda9bdacf

SHA1
e044894fd9c9c4a2d277d21010bf01b0e31b4d41

SHA256
91a07e51ef42ef6d5f6276bc6a6d77df296956768ed8824e96baf8614f3fd893

SHA512
8b2ddabf618ff20b9eb3ce84c96f193fc56bb190dd961c7a0811bb938f9ec4bc954e0db063afde0507a7adad226b6326525f6f46cc18985ea2c95367375a6c59

Download Submit
memory/1636-69-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/1636-66-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/1636-75-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/1636-73-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/1636-107-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/1636-74-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/1636-102-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/1636-100-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/1636-94-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/1636-88-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/1636-70-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/1636-81-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2296-3-0x0000000000560000-0x000000000057C000-memory.dmp

Filesize
112KB

Download
memory/2296-5-0x00000000748C0000-0x0000000074FAE000-memory.dmp

Filesize
6.9MB

Download
memory/2296-0-0x00000000748CE000-0x00000000748CF000-memory.dmp

Filesize
4KB

Download
memory/2296-35-0x00000000748C0000-0x0000000074FAE000-memory.dmp

Filesize
6.9MB

Download
memory/2296-2-0x00000000748C0000-0x0000000074FAE000-memory.dmp

Filesize
6.9MB

Download
memory/2296-4-0x00000000748CE000-0x00000000748CF000-memory.dmp

Filesize
4KB

Download
memory/2296-1-0x0000000000990000-0x0000000000AAC000-memory.dmp

Filesize
1.1MB

Download
memory/2296-6-0x0000000004FE0000-0x00000000050A4000-memory.dmp

Filesize
784KB

Download
memory/2636-31-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2636-28-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2636-14-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2636-16-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2636-20-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2636-22-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2636-24-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2636-26-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2636-30-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2636-32-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2636-18-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2832-41-0x0000000000AC0000-0x0000000000BDC000-memory.dmp

Filesize
1.1MB

Download